A solid has a structure in which `W` atoms are located at the corners of a cubic lattice, `O` atom at the centre of edges, and `Na` atom at the centre of the cube. The formula for the compound is

Options

A. `NaWO_(2)`
B. `NaWO_(3)`
C. `Na_(2)WO_(3)`
D. `NaWO_(4)`

Answer

B

Explanation

In a unit cell, W atoms at the corner `= 1/8 xx 8 = 1`
O atoms at the centre of edges `=1/4 xx 12 = 3`
Na atoms at the centre of the cube = 1
`W: O : Na = 1:3:1`, hence formula = `NaWO_(3)`